dragon-nx-32: example (hopefully correct) of a GFIOC_WAITVB

diff --git a/Kernel/platform-dragon-nx32/devtty.c b/Kernel/platform-dragon-nx32/devtty.c
index d56f248..ebb528e 100644 (file)
--- a/Kernel/platform-dragon-nx32/devtty.c
+++ b/Kernel/platform-dragon-nx32/devtty.c
@@ -284,7 +284,7 @@ static struct display display[4] = {
                0xFF, 0xFF,             /* For now */
                FMT_MONO_WB,
                HW_UNACCEL,
-               GFX_TEXT|GFX_MAPPABLE,
+               GFX_TEXT|GFX_MAPPABLE|GFX_VBLANK,
                0,
                GFX_DRAW|GFX_READ|GFX_WRITE,
        },
@@ -295,7 +295,7 @@ static struct display display[4] = {
                0xFF, 0xFF,             /* For now */
                FMT_MONO_WB,
                HW_UNACCEL,
-               GFX_TEXT|GFX_MAPPABLE,
+               GFX_TEXT|GFX_MAPPABLE|GFX_VBLANK,
                0,
                GFX_DRAW|GFX_READ|GFX_WRITE,
        },
@@ -307,7 +307,7 @@ static struct display display[4] = {
                0xFF, 0xFF,             /* For now */
                FMT_COLOUR4,
                HW_UNACCEL,
-               GFX_MAPPABLE,
+               GFX_MAPPABLE|GFX_VBLANK,
                0,
                GFX_DRAW|GFX_READ|GFX_WRITE,
        },
@@ -318,7 +318,7 @@ static struct display display[4] = {
                0xFF, 0xFF,             /* For now */
                FMT_COLOUR4,
                HW_UNACCEL,
-               GFX_MAPPABLE,
+               GFX_MAPPABLE|GFX_VBLANK,
                0,
                GFX_DRAW|GFX_READ|GFX_WRITE,
        },
@@ -420,6 +420,12 @@ int gfx_ioctl(uint8_t minor, uarg_t arg, char *ptr)
 //             sam_v[(b & 4)?5:4] = 0;
                return 0;
        }
+       case GFXIOC_WAITVB:
+               /* Our system clock is our vblank, use the standard timeout
+                  to pause for one clock */
+               udata.u_ptab->p_timeout = 2;
+               psleep(NULL);
+               return 0;
        case GFXIOC_DRAW:
        case GFXIOC_READ:
        case GFXIOC_WRITE: